# Spacecruft Leaflet Galmon
`leaflet-galmon` is a set of scripts to retrieve Galmon GNSS
data and feed it to Leaflet maps for visualization.

The Galmon GNSS Monitoring Project's 
*"goals are to monitor the major Global Navigation Satellite Systems,
including GPS, GLONASS, Galileo and BeiDou, but also Space Base
Augmentation Systems like WAAS, EGNOS and GAGAN. Galmon is an open
source & open data project with a community of over 30 station operators
running more than 50 receivers."*

Leaflet is cute, free, easy way to use Python and maps.

# Screenshots
Screenshots of GNSS satellites and
Galmon Observers, generated by `leaflet-galmon-observers`.

*Leaflet with Galmon Observer locations and GNSS satellites.*
![leaflet-galmon-observers](pics/leaflet-galmon-observers.png)


# Install
Install thusly.

If you want to generate your own files:
```
# Quick & dirty Python setup
sudo apt update
sudo apt install python3-pip
pip install --user --upgrade pip
pip install --user -r requirements.txt
```

# Run
Run thusly.

Retrieve Galmon observers, output for Leaflet.
```
./leaflet-galmon-observers
```

# Galmon Data
Galmon data can be retrieved from the website in JSON format.
Available URLs:

Global, overview of data collection:
* https://galmon.eu/global.json

Service Vehicles (Satellites):
* https://galmon.eu/svs.json

Almanac. Can also be queried with `t` time flag:
* https://galmon.eu/almanac.json
* https://galmon.eu/almanac.json?t=1653332121

Observers (Ground Stations):
* https://galmon.eu/observers.json

Coverage:
* https://galmon.eu/cov.json
* https://galmon.eu/cov.json?gps=0&galileo=1&beidou=0&glonass=0

SBAS:
* https://galmon.eu/sbas.json

# See Also
## Spacecruft
Spacecruft:

* https://spacecruft.org/spacecruft/celestia-gnss

* https://spacecruft.org/spacecruft/gnss-earth

## Galmon
Galmon main page:
* https://galmon.eu

Galmon web map:
* https://galmon.eu/geo/

Source code:
* https://github.com/berthubert/galmon

Observers:
* https://berthub.eu/articles/posts/galmon-project/


# Status
Alpha, under development.

# License / Copyright
Unofficial project, not part of Leaflet or Galmon.
Upstream sources under their respective copyrights.

Copyright (C) 2022 Jeff Moe.

License: GPLv2 or any later version.